Relational Operators Overloading in C++
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There are various relational operators supported by C++ language like (<, >, <=, >=, ==, etc.) which can be used to compare C++ built-in data types.
You can overload any of these operators, which can be used to compare the objects of a class.
Following example explains how a < operator can be overloaded and similar way you can overload other relational operators.
Live Demo#include <iostream> using namespace std; class Distance { private: int feet; // 0 to infinite int inches; // 0 to 12 public: // required constructors Distance() { feet = 0; inches = 0; } Distance(int f, int i) { feet = f; inches = i; } // method to display distance void displayDistance() { cout << "F: " << feet << " I:" << inches <<endl; } // overloaded minus (-) operator Distance operator- () { feet = -feet; inches = -inches; return Distance(feet, inches); } // overloaded < operator bool operator <(const Distance& d) { if(feet < d.feet) { return true; } if(feet == d.feet && inches < d.inches) { return true; } return false; } }; int main() { Distance D1(11, 10), D2(5, 11); if( D1 < D2 ) { cout << "D1 is less than D2 " << endl; } else { cout << "D2 is less than D1 " << endl; } return 0; }
When the above code is compiled and executed, it produces the following result −
D2 is less than D1
cpp_overloading.htm
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